The largest choice of DIY products

How to control water pressure?

Guide written by:
Jérôme, Artisan, Haute Savoie

Jérôme, Artisan, Haute Savoie

183 guides

Pressure reducers, booster pumps, pressure switches, meter regulators and pressure gauges are all required for the proper operation and control of water pressure in individual dwellings and buildings. To avoid too low or too high water pressure, follow the advice in this guide!

Important features

  • Pressure reducer
  • Booster pump
  • Pressure limiter
  • Pressure gauge
  • Meter regulators

Water pressure: how to control your installation's water pressure?

ManoMano

Drinking water sent to your home by private companies or municipalities is distributed under pressure. The average delivery pressure is 3 bars.


This pressure is required for the network to properly function and allows water to be pushed to the upper floors of buildings.


Insufficient pressure will result in your faucets only providing a small trickle of water, your washing machine or dishwasher ceasing to function, or you won't even have water upstairs...


Too much pressure, and your entire sanitary installation will suffer. Your water heater, your electrical appliances and all your pipes can be damaged, so water pressure is a crucial parameter that should not be overlooked. There are different methods for measuring, regulating, and effectively controlling water pressure:

  • Pressure reducers for when you need to lower the distributed water pressure - most pressure regulators are factory configured;
  • The booster pump and their accessories for when, on the other hand, water pressure you are receiving is insufficient;
  • Pressure gauges are very useful for reading and monitoring water pressure in real time - often displaying bars or PSI, 3 bars being a standard distribution pressure;
  • Pressure limiters are also called pressure switches. Most often used in industry, limiters deviate overflow pressure to a third-party circuit or a tank - away from the pump etc.;
  • Meter regulators are used when the water pressure is too high, to reduce the pressure to a normal operating value (the regulators are adjustable). It differs from the pressure reducer in that the meter regulator, by design, is less sensitive to changes in inlet pressure and delivers a more constant operating pressure.

Water pressure: what is a pressure reducer?



Sometimes the distributed water pressure is just too high to be used. You cannot ingore the risk of the pressure is being too high! Leaks, breakages and damaged appliances can easily occur!



To prevent this, you can lower the water pressure, starting at the water meter's outlet. The simplest way is to set up a pressure reducer.


Characteristics of a pressure reducer

A pressure reducer is installed at the meter's outlet and ideally comes after a shut-off valve, if your installation is equipped as such. To connect it, depending on your installation, you can opt for a male-to-male, male-to-female or female-to-female pressure reducer. For a home network, the fitting size is 3/4", or 20x27 using the metric system. As a result, the pressure reducer can be mounted directly on both a meter or a valve.


The large majority of pressure reducers are factory preset with an output pressure set at 3 bars. For better control (since some reducers are adjustable), you can set up a pressure gauge to read the generated pressure in real time.


Be careful not to mix up the reducer and the regulator! A pressure reducer is less efficient in terms of regulation if the incoming pressure fluctuates greatly.

Water pressure: booster pump and accessories


If your biggest problem is not to lower the water pressure but the opposite, to increase it, you need the perfect tool: a pressure booster. This appliance consists of a membrane and its seal, a pressure limiter and one or more pressure gauges.


Membrane: inflated in an expansion tank, the membrane pressurizes the water throughout the network.


Membrane seal: A metal part used to seal the membrane/tank connection.


Pressure limiter or pressure switch : detects set pressure points, protects pipes and the general installation against high pressures, as well as triggering or activating the pressure booster's operation.


Pressure gauge : reading the pressure level in real time.

Water pressure: what is a pressure gauge?



A pressure gauge is crucial for getting real time data on your network's water pressure of a network. This measuring device is delimited in bars (metric system) or in PSI (Anglo-Saxon system).


A tapping connection is used to attach it on the water pipe. It can also be installed directly on any element (such as a reducer or pressure regulator) provided that it has a specific mounting system to accommodate it.


The most useful information to obtain in relation to water pressure is the pressure being received by the water meter, basically the same pressure that will be distributed in the house, building, workshop etc. Placing the pressure gauge right after the meter is the ideal configuration.
 

In order to check the pressure regulator or reducer's proper operation, the best configuration is to have a pressure gauge before and after the pressure reducer or pressure booster.
 


If you need to adjust your regulator or reducer, remember that it should always be set in dynamic pressure, as opposed to static pressure. You must therefore adjust your mainframe network (like a large open tap).


Important to know, and should help you in the initial configuration, always remember that 3 to 3.5 bars or pressure is ideal. If your pressure gauge is delimited in PSI, this corresponds to a pressure of 43.5 to 51 PSI (1 bar = 14.50 PSI).

Water pressure: what is a pressure limiter?


Pressure limiters (or pressure switches) are mainly used in industrial installations.


The pressure limiter is used to protect appliances and pipelines as well as users from abnormal overpressurization.


It is often used at the pump outlet, at the network's start and wherever there may be an unexpected rise in pressure throughout the network.


Depending on its technology, the excess pressure can be redirected to a tank (if installed at the pump outlet), or eliminated by a valve (open air). In some cases, the excess pressure can also supply a third-party network.


The pressure limiter can be equipped with an adjustable pressure gauge: when the pressure in a grid drops below 3 bars, the  pump activates, and as soon as the pressure rises to 4 bars, it will cease operation.



Water Pressure: What is a meter regulator?




The meter regulator is reality another type pressure reducer. However, due to its design (often with spring and membrame) it is much less sensitive to incoming pressure fluctuations, and therefore produces a more stable operating pressure.



Characteristics


The meter regulator is installed at the meter outlet - ideally after a shut-off valve if your installation is equipped with it.


To connect it, depending on your installation, you can opt for a male-to-male, male-to-female or female-to-female reducer. Domestic installation will generally use the fitting size of 3/4 inches, or 20x27 in metric. The regulator can therefore be installed directly after the meter or valve's outlet.


The pressure regulators are generally preset at the factory with an output pressure set at 3 bar. For better control, you can add a pressure gauge to provide the pressure data in real time.  


To accurately set your regulator, remember that this type of appliance must be calibrated in dynamic pressure (ie when the water network is open downstream), so a large, open tap should do the trick.

Did you find this guide helpful? Yes
0 upvotes
Guide written by:

Jérôme, Artisan, Haute Savoie 183 guides écrits

Jérôme, Artisan, Haute Savoie
Électrotechnicien de formation, j'ai tout d'abord travaillé dans l'industrie où j'ai installé, câblé et dépanné bon nombre d'installations. Par la suite, j'ai encadré les équipes qui réalisaient ces travaux. Depuis quelques années je vole de mes propres ailes et suis artisan électricien. Avec plusieurs centaines de chantiers à mon actif, un travail bien fait et la satisfaction de mes clients sont mes priorités.

Depuis 6 ans, je restaure et agrandis un chalet au cœur de la Haute Savoie. Mon expérience en travaux et mes connaissances me rendent un fier service. Terrassement, aménagement intérieur, toiture, plomberie, électricité, tout y passe ! Nous avons, ma fille ma femme et moi, presque tout fait nous-même ! Alors répondre à vos questions, et vous orienter ou vous conseiller pour choisir vos outils ? Facile !

The products related to this guide